Drive-gear for corn-planters.



No. 755,595. PATENTED MAR. 22, 1904.

, W. s. GRAHAM. .DRIVE GEAR PoR CORN PLANTERS.

APPLICATION FILED JUNE 5,1903.

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Inventor No. 755,595. PATENTBD MAR. 22, 1904. W. S. GRAHAM.

DRIVE GEAR POR CORN PLANTERS.

APPLICATION FILED JUNE 5,1903.

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UNITED STATES Patented March 2,2, 1904.

PATENT Tricem WILLIAM S. GRAHAM, OF CANTON, ILLINOIS, ASSIGNOR TO PARLIN& ORENDORFF COMPANY, OF CANTON, ILLINOIS, A CORPORATION OF ILLINOIS.

DRIVE-GEAR FOR CORN-PLANTERS.

SPECIFICATION forming part of Letters Patent N o. l755,595, dated March22, 1904. Application filed June 5, 1903. Serial No. 160,256. (Nomodel.)

T0 all whom t nto/y concern:

Be it known that I, WILLIAM S. GRAHAM, of the city of Canton, county ofFulton, and State of Illinois, have invented certain new and usefulImprovements in Drive-Gear for Corn-Planters, of which the following isa specification.

This invention relates to that class of checkrow planters in which theseed-plates are started at a cross-row, are moved a certain distancewhile traveling between cross-rows, and are stopped before the nextcross-row is reached.

The object of the invention is to provide means for driving theseed-plates intermittently.

The gear movement is of the mutilated -gear type as distinguished fromthe clutch type. It is exemplified in the structure hereinafterdescribed, and it is defined in the appended claims.

In the drawings forming part of this specification, Figure l is a planof my improved drive-gear. Fig. 2 is a side elevation of the gear, andFig. 3 is a detail of the mutilated pinion used to develop intermittentmotion in the seed-plates. Fig. 4 is a side elevation of the gear,showing how the mutilated pinion is thrown into mesh with thedrive-wheel of the gear by the rock of the check-row shaft.

The shaft used to drive the seed-plates, commonly called thedrill-shaft, 7 is shown at 1. The check-row shaft, which is rockedbackward at cross-rows by knots on a checkrow wire or other outsideinfluence, is shown at 2. The drill-shaft is rotated intermittently inthe direction indicated by the arrow in Fig. l, while the check-rowshaft is given a rocking motion. The functions and modes of operation ofthe drill-shaft and the eheckrow shaft of a planter are too well knownto require special description.

A sprocket-wheel 3 is journaled loosely on the drill-shaft, and it has abevel gear-wheel 4f formed on or secured to one of its faces. Amutilated bevel gear-wheel 6 is fastened onto the drill-shaft. It isnested in the face of wheel 4L, its teeth correspond with the teeth ofthe wheel except for the mutilation, and when the mutilated wheel is inoperation the two wheels rotate as one. In Fig. 3 the teeth of themutilated wheel are shown at 6a and the mutilated spaces are shown at6b.

A bevel gear-pinion 5 is journaled at right angles. The teeth of thepinion are as long as the combined lengths of the teeth of wheels 4; and6, and it meshes with both wheels while the mutilated wheel is inaction.

The mutilation of wheel 6 is sufficient to relieve the wheel from theaction of the pinion, and when the mutilated spaces are reached in thetravel of the wheel the drill-shaft will lose its driving force.

As a matter of preference the wheel 6 has two mutilated spaces, oneopposite the other; but, as will hereinafter appear, provision may bemade for controlling the drill-shaft with a wheel having but onemutilation.

Vhen the drill-shaft is at rest with a mutilated space of wheel 6presented to pinion 5, the sprocket-wheel 3, the gear-wheel 4, and thepinion may rotate indefinitely without affecting the drill-shaft and theseed-plates driven thereby; but if the drill-shaft is given a slightrotary motion sufcient to bring a tooth of the mutilated wheel into meshwith the pinion the drill-shaft will be rotated by the pinion until theother mutilated space is reached.

Various mechanical expediente may be employed to give the drill-shaftits initial motion and to stop it after it has completed an operativeadvance of the seed-plate; but I prefer to use the mechanism shown inthe aecompanying drawings,the characteristics of which are as follows: Abracket l() is rigidly connected with the check-row shaft and isprovided with a stop extension 11 on the rear edge of its swinging end.A stop-arm 12 is pivctally connected with the swinging end of thebracket 10, and it has a laterally-projecting pin 13, the function ofwhich is to start and stop the drill-shaft. A spring 14 pulls rearwardon arm l2 and tends to hold it in contact with the stop extension 11.rlhe spring also tends to hold the check-row shaft in its normal orprepared position, as shown in Fig. 2. An arm 7 is fastened onto thedrill-shaft, and it eXtends in opposite directions therefrom. On eachend of arm 7 is formed an inclined bearing-surface 8, and back of eachincline is a notch or depression 9, adapted to receive pin 13- ofstop-arm 12.

As shown in the drawings, the check-row shaft is in its forwardposition, the mutilated wheel is out of mesh with the pinion, and thedrill-shaft is held against rotation by the pin 13 engaging a notch 9 ofarm 7. Under these conditions the planter may travel forward withsprocket-wheel 3 receiving motion from a carrying-wheel, and theseed-plates will remain stationary so far as operative rotation isconcerned until the check-row shaft is rocked backward by a cheek-rowknot or some other influence outside the planter. Backward rock of thecheck-row shaft is imparted to the drill-shaft in a reverse direction bypin 13 acting on arm 7, and as soon as the drill-shaft is rocked forwardfar enough to bring a tooth of the mutilated wheel into mesh with thepinion force will be imparted to the drillshaft through the pinion tocomplete an operative movement of the seed-plates. The rule of action ofthe specific mechanism herein described demands that the seed-platesshall receive an operative motion while the drill-shaft is makingaone-half rotation. rlhe spring 14: returns the check-row shaft to itsshown position as soon as the check-row knot is passed, and when theincline on the opposite end of arm 7 approaches pin 13 it finds lever 12held by the spring against stop 11 with pin 13 extended across the pathof the incline. The incline forces the pin away from the drill -shaft ,vagainst the tension of the spring, and as soon as the incline passes thepin, which is just as the mutilated gear-wheel is moving out of meshwith the pinion, the pin is snapped into notch 9 and the drill-shaft islocked.

By gearing the seed-plates with the drillshaft, so that a completerotation of the shaft will give an operative advance to the seedplates,one of the ends of arm 7 may be omitted and the gear-wheel 6 may bemutilated on one side only; but it is preferable to give an advance tothe seed-plates by a one-half rotation of the drill-shaft, for thereason that there is less motion, less wear, and less jar under thelast-named arrangement and for the furtherl reason that a largersprocket-wheel may be used and the drive-chain may run around the rearbar 17 of the front frame instead of entirely above it.

The front cross-bar of the front frame of a planter is shown at 18 andthe rear cross-bar at 17. A bridge-bracket 19 connects the crossbars andprovides bearings for the shafts, and a lateral extension of the bracketprovides a support 20 for the bearing of pinion 5. An arm 16 oncross-bar 17 provides a point of connection for the link-bolt 15 ofspring 111.

I claim- 1. Drive-gearing for seed-plates of planters, comprising adrive-shaft for the seed-plates, a gearwheel journaled loosely on thedriveshaft, a mutilated gear-wheel fastened onto the shaft with itsteeth normally in line with the teeth of the loose wheel, a pinionmeshing with the loose wheel and adapted to mesh with the mutilatedwheel, and means for moving the shaft to carry the multilated wheel intomesh with the pinion.

2. Drive-gearing for seed-plates of planters, comprising a drive-shaftfor the seed-plates, a gearwheel journaled loosely on the driveshaft, agear-wheel mutilated on opposite sides and fastened onto the shaft withits teeth normally in line with the teeth of the loose wheel, a pinionin mesh with the loose wheel and adapted to mesh with the mutilatedwheel, and means for moving the shaft to carry the mutilated wheel intomesh with the pinion.

3. Drive-gearing for seed-plates of planters, comprising a drive-shaftfor the seed-plates, a bevel-gear drive-wheel journaled loosely on theshaft, a bevel-gear mutilated wheel fastened onto the shaft and nestingwith the loose wheel with its teeth normally in line with the teeth ofthe loose wheel, a bevel gear-pinionv having teeth long enough to engagethe teeth of the loose wheel and the teeth of the mutilated wheel, saidpinion being in mesh with the loose wheel, and means for moving thedrive-shaft to carry the mutilated wheel in mesh with the pinion. 4

4. Drive-gearing for seed-plates of planters, comprising a drive-shaftfor the seed-plates, a sprocket-wheel journaled loosely on the shaft, agear-wheel attached to the sprocket-wheel, a mutilated gear-wheelfastened onto the shaft with its teeth normally in line with the teethof the loose wheel, a pinion meshing with the loose wheel and adapted tomesh with the mutilated wheel, and means for moving the shaft to carrythe mutilated wheel into mesh with the pinion.

5. In driving-gear for the seed-plates of planters, the combination of adrill-shaft, a check-row shaft, a gear-wheel journaled loosely on thedrillshaft, a mutilated gearwheel fastened onto the drill-shaft with itsteeth normally in line with the teeth of the loose wheel, a pinionmeshing with the loose wheel and adapted to mesh with the mutilatedwheel, and an arm on the check-row shaft adapted to engage thedrill-shaft and move the mutilated wheel into mesh with the pinion.

6. In driving-gear for the seed-plates of planters, the combination of adrill-shaft, a check-row shaft, a gear-wheel journaled loosely on thedrill-shaft, a mutilated gearwheel fastened onto the drill-shaft withits teeth normally in line with the teeth of the IOO IIO

ISO

loose wheel, a pinion meshing with the loose wheel and adapted to meshwith the mutilated wheel, an extension on the drill-shaft and a yieldingarm on the check-row shaft adapted to engage the extension on thedrill-shaft.

7. In driving-gear for the seed-plates of planters, the combination' ofa drill-shaft, a check-row shaft, a gear-wheel journaled loosely on thedrill-shaft, a mutilated gearwheel fastened onto the drill-shaft withits teeth normally in line with the teeth of the loose wheel, a pinionmeshing with the loose wheel and adapted to mesh with the mutilatedwheel, an extension on the drill-shaft having on its end an inclinewhich terminates in a notch, a yielding arm on the check-row shaft and apin on the end of the arm adapted to ride up the incline of theextension and engage the notch thereof.

8. In drive-gearing for seed-plates of planters, the combination of adrill-shaft, a checkrow shaft, a gear-wheel journaled loosely on thedrill-shaft, a gear-wheel mutilated on opposite sides and fastened o ntothe drill-shaft with its teeth normally in line with the teeth of theloose wheel, a pinion meshing with the loose wheel and adapted to meshwith the mutilated wheel, arms on the drill-shaft eX- tending inopposite directions and having each an inclined outer surfaceterminating in a notch, a yielding arm on the check-row shaft, and a pinon the arm adapted to engage the notches.

9. In drivegearing for the seed-plates of planters, the combination of adrill shaft, a check-row shaft, a gear wheel journaled loosely on thedrill-shaft, a mutilated gearwheel fastened onto the drill-shaft withits teeth normally in line with the teeth of the loose wheel, a pinionmeshing with the loose wheel and adapted to mesh with the mutilatedwheel, a bracket attached to the check-row shaft, an arm hinged on theextended end of the bracket, a stop on the bracket limiting the swing ofthe arm away from the check-row shaft, a spring drawing the arm towardthe stop, and a pin on the swinging end of the arm adapted to engage anextension on the drillshaft.

Y In testimony whereof I sign my name in the presence of two subscribingwitnesses.

WM. S. GRAHAM.

Witnesses:

W. F. MOORE, K. D. VITTUM.

